As crude a weapon as the cave man’s club, the chemical barrage has been hurled against the fabric of life—a fabric on the one hand delicate and destructible, on the other miraculously tough and resilient, and capable of striking back in unexpected ways. [On the effect of chemical insecticides and fertilizers.]

If Darwin were alive today the insect world would delight and astound him with its impressive verification of his theories of the survival of the fittest. Under the stress of intensive chemical spraying the weaker members of the insect populations are being weeded out… . Only the strong and fit remain to defy our efforts to control them.

In Sheldon it was not only the wild creatures [and cats] … that were sacrificed in the campaign against an insect. … Sheep [were in]… a small, untreated blue-grass pasture across a gravel road from a field which had been treated with dieldrin spray…. Evidently some spray had drifted across the road into the pasture, for the sheep began to show symptoms of intoxication almost at once…. They lost interest in food and displayed extreme restlessness, following the pasture fence around and around apparently searching for a way out… [They] bleated almost continuously, and stood with their heads lowered… [Several] sheep eventually died.

These insecticides are not selective poisons; they do not single out the one species of which we desire to be rid. … Scientific observers at Sheldon described the symptoms of a meadowlark found near death: “Although it lacked muscular coordination and could not fly or stand, it continued to beat its wings and clutch with its toes while lying on its side. Its beak was held open and breathing was labored.”